Switch off VREFBUF on STM32U5

[Tomas Hamouz]

Is it possible to switch  VREFBUF clock off after configuration for power save? So the clock is off and the buffer is providing Vref.

In DS there is no mention about it (e.g OPAMP has this note).

[MGAGE.1 · Accepted solution]

Hello @Tomas Hamouz, 

Yes, it's possible to switch off the clock of VREFBUF for power save. 

Once the VREFBUF is configured and stabilized, the clock can be disabled, while the buffer continues to provide the reference voltage.

If you need to reconfigure VREFBUF, you will need to re-enable the clock, make the changes, wait for stabilization, and then disable the clock.

Thank you for your message, 

Best regards.